diff --git a/openvpn/README.md b/openvpn/README.md
index a97cadf..491d42b 100644
--- a/openvpn/README.md
+++ b/openvpn/README.md
@@ -93,4 +93,4 @@ $ systemctl enable openvpn@client
 [1]: https://openvpn.net/index.php/open-source.html
 [2]: https://github.com/vimagick/dockerfiles/tree/master/fteproxy
 [3]: https://github.com/vimagick/dockerfiles/tree/master/stunnel
-[3]: https://github.com/vimagick/dockerfiles/tree/master/kcptun
+[4]: https://github.com/vimagick/dockerfiles/tree/master/kcptun